| Title |
Fire Resistance of Cementless Composites Made With Blast Furnace Slag Using Different Alkali Activators |
| Authors |
최세진(Choi, Se-Jin) ; 박정연(Park, Jeong-Yeon) ; 이재인(Lee, Jae-In) |
| DOI |
https://doi.org/10.5659/JAIK.2026.42.4.377 |
| Keywords |
Cementless; Fire Resistance Performance; Paste; Flow; Compressive Strength |
| Abstract |
The construction industry has recently focused on cementless composites as a way to reduce carbon dioxide emissions. The type of alkali
activator used in these composites plays a crucial role in determining their performance. Research on calcium-based activators, however, has
been limited compared to sodium-based activators. This study evaluates the fluidity, mechanical properties, durability, and fire resistance of
cementless composites using different calcium-based and sodium-based alkali activators. Fluidity tests showed that CNNO mixtures achieved
the optimal flow time, although their compressive strength was lower than that of OPC-based mixtures. Ultrasonic velocity measurements
before and after heating indicated that OPC-based mixtures generally had higher velocities than cementless mixtures at most ages. Core
temperature measurements after an 800°C heating test showed that cementless mixtures were approximately 30% lower than OPC-based
mixtures. |